Author: Jessica Espinosa
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The fiddler crab Uca pugnax is a semi-terrestrial estuarine crab that lives in salt marshes along the Eastern coast of North America from northern Florida to New Hampshire (Sanford et al. 2006). Uca pugnax is an important study organism because it impacts the surrounding ecosystem, as fiddler crabs can maintain Spartina growth, are a major staple in the diet of many fish species and other predators, and eat many of the meiofaunal organisms present in the surrounding Spartina. There is an interest in studying these crabs in particular because their coastal range is expanding north, and this expansion could lead to a modification in the structure of the surrounding ecosystem. The farthest north scientists previously found these crabs was in Cape Cod, MA, but in recent years climate change has caused a northern range expansion of both the species and of fiddler crabs as a whole (Sanford et al. 2006). In the northern part of Uca pugnax's range, water temperature is the limiting factor, and therefore explains the range expansion north due to the increasing global temperatures. In fiddler crabs, fat is mobilized for reproduction, and since fitness means the ability to survive and reproduce, fitness equals fatness, or body condition. It is hypothesized that latitude is correlated with Uca pugnax body condition, and that there is also some seasonal variation in body condition along the range. When four different locations along the range were sampled, no differences in body condition were found between sites. This is interesting because in the northern end of the range, adult fiddler crabs spend nearly half of the year underground, and thus have a much shorter feeding season than southern fiddler crabs. However, a significant difference was found between seasons for fall 2012 and the interaction of season and location. The number of ovigerous females was lowest in the fall throughout all locations, and a male-skewed sex ratio was seen in Georgia. These results are preliminary, but suggest that crabs in all locations share a similar body condition despite the varying global temperatures. There is also a seasonal difference, which may be more prominent at the southern end of the range.
Sex Ratio and Body Condition in Female Uca Pugnax Fiddler Crabs Along the Eastern Coast of the United States
Author: Jessica Espinosa
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The fiddler crab Uca pugnax is a semi-terrestrial estuarine crab that lives in salt marshes along the Eastern coast of North America from northern Florida to New Hampshire (Sanford et al. 2006). Uca pugnax is an important study organism because it impacts the surrounding ecosystem, as fiddler crabs can maintain Spartina growth, are a major staple in the diet of many fish species and other predators, and eat many of the meiofaunal organisms present in the surrounding Spartina. There is an interest in studying these crabs in particular because their coastal range is expanding north, and this expansion could lead to a modification in the structure of the surrounding ecosystem. The farthest north scientists previously found these crabs was in Cape Cod, MA, but in recent years climate change has caused a northern range expansion of both the species and of fiddler crabs as a whole (Sanford et al. 2006). In the northern part of Uca pugnax's range, water temperature is the limiting factor, and therefore explains the range expansion north due to the increasing global temperatures. In fiddler crabs, fat is mobilized for reproduction, and since fitness means the ability to survive and reproduce, fitness equals fatness, or body condition. It is hypothesized that latitude is correlated with Uca pugnax body condition, and that there is also some seasonal variation in body condition along the range. When four different locations along the range were sampled, no differences in body condition were found between sites. This is interesting because in the northern end of the range, adult fiddler crabs spend nearly half of the year underground, and thus have a much shorter feeding season than southern fiddler crabs. However, a significant difference was found between seasons for fall 2012 and the interaction of season and location. The number of ovigerous females was lowest in the fall throughout all locations, and a male-skewed sex ratio was seen in Georgia. These results are preliminary, but suggest that crabs in all locations share a similar body condition despite the varying global temperatures. There is also a seasonal difference, which may be more prominent at the southern end of the range.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The fiddler crab Uca pugnax is a semi-terrestrial estuarine crab that lives in salt marshes along the Eastern coast of North America from northern Florida to New Hampshire (Sanford et al. 2006). Uca pugnax is an important study organism because it impacts the surrounding ecosystem, as fiddler crabs can maintain Spartina growth, are a major staple in the diet of many fish species and other predators, and eat many of the meiofaunal organisms present in the surrounding Spartina. There is an interest in studying these crabs in particular because their coastal range is expanding north, and this expansion could lead to a modification in the structure of the surrounding ecosystem. The farthest north scientists previously found these crabs was in Cape Cod, MA, but in recent years climate change has caused a northern range expansion of both the species and of fiddler crabs as a whole (Sanford et al. 2006). In the northern part of Uca pugnax's range, water temperature is the limiting factor, and therefore explains the range expansion north due to the increasing global temperatures. In fiddler crabs, fat is mobilized for reproduction, and since fitness means the ability to survive and reproduce, fitness equals fatness, or body condition. It is hypothesized that latitude is correlated with Uca pugnax body condition, and that there is also some seasonal variation in body condition along the range. When four different locations along the range were sampled, no differences in body condition were found between sites. This is interesting because in the northern end of the range, adult fiddler crabs spend nearly half of the year underground, and thus have a much shorter feeding season than southern fiddler crabs. However, a significant difference was found between seasons for fall 2012 and the interaction of season and location. The number of ovigerous females was lowest in the fall throughout all locations, and a male-skewed sex ratio was seen in Georgia. These results are preliminary, but suggest that crabs in all locations share a similar body condition despite the varying global temperatures. There is also a seasonal difference, which may be more prominent at the southern end of the range.
Fiddler Crabs of the World
Author: Jocelyn Crane
Publisher: Princeton University Press
ISBN: 1400867932
Category : Science
Languages : en
Pages : 766
Book Description
Jocelyn Crane presents a survey of the members of the genus Uca, with special reference to their morphology, social behavior, and evolution. Her account is firmly based on numerous field studies along the world's warmer shores and on comparative work in laboratories and museums. Originally published in 1975. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Publisher: Princeton University Press
ISBN: 1400867932
Category : Science
Languages : en
Pages : 766
Book Description
Jocelyn Crane presents a survey of the members of the genus Uca, with special reference to their morphology, social behavior, and evolution. Her account is firmly based on numerous field studies along the world's warmer shores and on comparative work in laboratories and museums. Originally published in 1975. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Molecular Population Genetics of the Atlantic Sand Fiddler Crab, Uca Pugilator, Along the Atlantic Coast
Author: David Andrew Weese
Publisher:
ISBN:
Category : Fiddler crabs
Languages : en
Pages : 63
Book Description
Author's abstract: The Atlantic sand fiddler crab, Uca pugilator, is an extremely abundant fiddler crab found along the eastern and Gulf coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days, which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However a large amount of morphological and behavioral variation is found between northern and southern populations along the eastern coast. This study was undertaken to determine the population genetic structure of U. pugilator and to determine whether these differences may have a genetic basis. The population structure of the fiddler crab was analyzed using 576 individuals collected from 12 sites along the eastern coast. PCR-base single stand conformation polymorphism (SSCP) was used to analyze segments of the mitochondrial 16S rRNA and the nuclear internal transcribed spacer 1 (ITS1) genes of these individuals. The ITS1 marker did not prove to be informative when screened by SSCP for this study. The 16S marker revealed a moderate amount of population structure (FST = 0.292) between populations. The results of this study reveal frequent gene flow between nearby localities, but reduced levels between populations separated by large distances. Despite the potential for high dispersal by planktonic larvae, population differentiation and isolation by distance was found between populations U. pugilator. Northern and southern regions are separated by a genetic distance of 0.3866 suggesting the potential for morphological and behavioral differentiation across the species range. INDEX WORDS: Uca pugilator, Fiddler crab, Population structure, Gene flow, Larval dispersal, Single-stand conformational polymorphism, 16S rDNA, ITS-1.
Publisher:
ISBN:
Category : Fiddler crabs
Languages : en
Pages : 63
Book Description
Author's abstract: The Atlantic sand fiddler crab, Uca pugilator, is an extremely abundant fiddler crab found along the eastern and Gulf coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days, which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However a large amount of morphological and behavioral variation is found between northern and southern populations along the eastern coast. This study was undertaken to determine the population genetic structure of U. pugilator and to determine whether these differences may have a genetic basis. The population structure of the fiddler crab was analyzed using 576 individuals collected from 12 sites along the eastern coast. PCR-base single stand conformation polymorphism (SSCP) was used to analyze segments of the mitochondrial 16S rRNA and the nuclear internal transcribed spacer 1 (ITS1) genes of these individuals. The ITS1 marker did not prove to be informative when screened by SSCP for this study. The 16S marker revealed a moderate amount of population structure (FST = 0.292) between populations. The results of this study reveal frequent gene flow between nearby localities, but reduced levels between populations separated by large distances. Despite the potential for high dispersal by planktonic larvae, population differentiation and isolation by distance was found between populations U. pugilator. Northern and southern regions are separated by a genetic distance of 0.3866 suggesting the potential for morphological and behavioral differentiation across the species range. INDEX WORDS: Uca pugilator, Fiddler crab, Population structure, Gene flow, Larval dispersal, Single-stand conformational polymorphism, 16S rDNA, ITS-1.
Conflict Over Male Searching in Fiddler Crabs
Author: Catherine Elaine deRivera
Publisher:
ISBN:
Category :
Languages : en
Pages : 314
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 314
Book Description
Behavioral Ecology and Population Biology in Populations of of Fiddler Crabs, Uca Pugnax (Smith), on the New Jersey Coast
Author: Lauren L. Bergey
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 268
Book Description
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 268
Book Description
The Effects of Temperature on the Timing, Form and Variability of the Wave Display in the Fiddler Crabs, Uca Minax and Uca Pugnax
Author: John Alvin Doherty
Publisher:
ISBN:
Category : Fiddler crabs
Languages : en
Pages : 382
Book Description
Publisher:
ISBN:
Category : Fiddler crabs
Languages : en
Pages : 382
Book Description
The Grapsoid Crabs of America
Author: Mary Jane Rathbun
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 812
Book Description
E.g. from CuraƧao: Sesarma (holometopus) ricordi (p. 309)); Aratus pisonii (p. 324); Plagusa depresa (p. 332); Cardisoma guanhumi (p. 345); etc.
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 812
Book Description
E.g. from CuraƧao: Sesarma (holometopus) ricordi (p. 309)); Aratus pisonii (p. 324); Plagusa depresa (p. 332); Cardisoma guanhumi (p. 345); etc.
Ecology Abstracts
Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 1052
Book Description
Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 1052
Book Description
Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Animal Weapons
Author: Douglas J. Emlen
Publisher: Macmillan
ISBN: 0805094504
Category : Nature
Languages : en
Pages : 288
Book Description
Emlen takes us outside the lab and deep into the forests and jungles where he's been studying animal weapons in nature for years, to explain the processes behind the most intriguing and curious examples of extreme animal weapons. As singular and strange as some of the weapons we encounter on these pages are, we learn that similar factors set their evolution in motion. Emlen uses these patterns to draw parallels to the way we humans develop and employ our own weapons, and have since battle began.
Publisher: Macmillan
ISBN: 0805094504
Category : Nature
Languages : en
Pages : 288
Book Description
Emlen takes us outside the lab and deep into the forests and jungles where he's been studying animal weapons in nature for years, to explain the processes behind the most intriguing and curious examples of extreme animal weapons. As singular and strange as some of the weapons we encounter on these pages are, we learn that similar factors set their evolution in motion. Emlen uses these patterns to draw parallels to the way we humans develop and employ our own weapons, and have since battle began.
Encyclopedia of Biology
Author: Don Rittner
Publisher: Infobase Publishing
ISBN: 1438109997
Category : Biology
Languages : en
Pages : 417
Book Description
Contains approximately 800 alphabetical entries, prose essays on important topics, line illustrations, and black-and-white photographs.
Publisher: Infobase Publishing
ISBN: 1438109997
Category : Biology
Languages : en
Pages : 417
Book Description
Contains approximately 800 alphabetical entries, prose essays on important topics, line illustrations, and black-and-white photographs.