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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The National Marine Fisheries Service of the U.S. National Oceanic and Atmospheric Administration (NOAA), headquartered in Silver Spring, Maryland, provides information on domestic threatened species. These species are likely to become endangered. The service discusses the population, range, biology, distribution, and major threats and impacts on the smalltooth sawfish. A photograph of the smalltooth sawfish is included.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The National Marine Fisheries Service of the U.S. National Oceanic and Atmospheric Administration (NOAA), headquartered in Silver Spring, Maryland, provides information on domestic threatened species. These species are likely to become endangered. The service discusses the population, range, biology, distribution, and major threats and impacts on the smalltooth sawfish. A photograph of the smalltooth sawfish is included.
Author: John Keith Carlson Publisher: ISBN: Category : Fish populations Languages : en Pages : 15
Book Description
"Smalltooth sawfish, Pristis pectinata, historically were found from Texas to New York. However, the population today is approximately 5% of its original size and restricted primarily to the waters of southern Florida, especially Everglades National Park adn adjacent areas (Seitz and Poulakis, 2002; Poulakis and Seitz, 2004; Simpfendorfer and Wiley, 2005). The decline of smalltooth sawfish has been attributed to catch and bycatch in commercial and recreational fishing, habitat loss, and a vulnerable life history (Simpfendorfer, 2002, 2005). In response to the decline in the population, the National Marine Fisheries Service (NMFS) listed this species as Endangered under the US Endangered Species Act in April 2003 (68 FR 15674)"--Introduction.
Author: David B. Snyder Publisher: Johns Hopkins University Press+ORM ISBN: 1421418738 Category : Science Languages : en Pages : 995
Book Description
“A highly useful and interesting reference for ichthyologists, recreational fish enthusiasts and those working in Florida waters . . . a worthy addition.” —Marine Biology Research The most comprehensive book about Florida’s marine fishes ever produced, Marine Fishes of Florida includes hundreds of photographs and descriptions of species you’ll encounter—plus many that are rare—when diving, snorkeling, kayaking, or fishing. Coverage includes both the Atlantic and Gulf coastline, from habitats near the shore to deeper waters. Fishes found in coastal rivers and other brackish waters are fully represented, as are offshore species that venture into Florida’s waters often enough to be called “occasional visitors.” David B. Snyder and George H. Burgess intertwine personal observations with results from research studies to provide accurate—often surprising—details. The result is a set of beautifully succinct identification descriptions coupled with information about each species’ natural history. From the largest sharks to the smallest cryptic gobies, from homely toadfishes to the spectacularly colored reef fishes, this book is certain to help you better understand the fish you’ve seen or hooked. Features of Marine Fishes of Florida include: Color photographs by leading marine photographers Differentiation of adult and juvenile forms Coverage of 133 fish families and hundreds of species Size and geographical range data Natural history and conservation notes Explanations of geologic history and current habitats “Entertaining and informative . . . I think this book will be a great addition to the library of any biologist, fisher, diver or student, and I strongly recommend this book to anyone wishing to expand their knowledge of Florida fishes.” —Environmental Biology of Fishes
Author: Rachel Marie Scharer Publisher: ISBN: Category : Pristis pectinata Languages : en Pages : 88
Book Description
ABSTRACT: Smalltooth sawfish, Pristis pectinata, is the first elasmobranch listed as endangered under the US Endangered Species Act, yet basic life history data critical for its conservation and recovery are lacking. To address this lack of information, I examined aspects of smalltooth sawfish life history via analysis of vertebrae collected from deceased fish (n = 15). First, I estimated fish age by counting opaque bands in vertebrae sections. Age estimates ranged from 0.4 to 14.1 years for fish that ranged in size between 0.60 and 4.35 m total length. A von Bertalanffy growth function fit to size at age data resulted in parameter estimates of 4.65 m for L, and 0.206 for K, and - 0.80 y for t0. Rostral teeth were also examined for aging but no opaque zones were present. Analysis of vertebrae sections with laser ablation-inductively coupled plasma-mass spectrometry also was conducted to infer fish salinity history based on Sr:Ca and Ba:Ca ratios across vertebrae transects. The Ba:Ca ratios showed no patterns or peaks consistent with salinity. However, a consistent pattern existed within Sr:Ca among vertebra samples for the first two years of life, with peaks of high and low Sr:Ca either indicating migrations or seasonally variable estuarine salinity.
Author: Peter Last Publisher: CSIRO PUBLISHING ISBN: 0643109145 Category : Science Languages : en Pages : 801
Book Description
Rays are among the largest fishes and evolved from shark-like ancestors nearly 200 million years ago. They share with sharks many life history traits: all species are carnivores or scavengers; all reproduce by internal fertilisation; and all have similar morphological and anatomical characteristics, such as skeletons built of cartilage. Rays of the World is the first complete pictorial atlas of the world’s ray fauna and includes information on many species only recently discovered by scientists while undertaking research for the book. It includes all 26 families and 633 valid named species of rays, but additional undescribed species exist for many groups. Rays of the World features a unique collection of paintings of all living species by Australian natural history artist Lindsay Marshall, compiled as part of a multinational research initiative, the Chondrichthyan Tree of Life Project. Images sourced from around the planet were used by the artist to illustrate the fauna. This comprehensive overview of the world’s ray fauna summarises information such as general identifying features and distributional information about these iconic, but surprisingly poorly known, fishes. It will enable readers to gain a better understanding of the rich diversity of rays and promote wider public interest in the group. Rays of the World is an ideal reference for a wide range of readers, including conservationists, fishery managers, scientists, fishers, divers, students and book collectors.
Author: Lisa Hollensead Publisher: ISBN: Category : Conservation biology Languages : en Pages :
Book Description
ABSTRACT: Habitat use studies can be used to both investigate ecological and behavioral patterns of animals as well as provide a useful management tool for conservation planners. However, essential habitat can be difficult to determine for highly mobile marine animals, especially when these species are rare or endangered. While critical habitat has been very broadly delineated for the endangered smalltooth sawfish (Pristis pectinata), essential fish habitat (EFH) within the nursery has not been fully described. I used telemetry methods to determine daily activity spaces and rates of movement (ROM) of juvenile P. pectinata in a nursery in southwest Florida. These results were tested for differences in diel and tidal patterns of activity. Seven juvenile animals ranging in size from 85 - 175 cm fork length were tagged in April - September 2011. Overall, activity spaces ranged from 0.07 - 0.17 km2 using 95% Minimum Convex Polygons (MCP), 0.01 - 0.16 km2 based on 50% kernel density estimates (KDE), and 0.08 - 0.68 km2 based on 95% (KDE). Average ROMs ranged from 2.4 - 6.1 meters/min. Activity space and ROMs reflected the morphology of the bay in which the animal was tracked such that fish in small bays had small activity spaces and ROMs. There were no detectable differences in activity space or ROM between ebb and flood tide or high or low tide. Activity space decreased and ROM increased at night indicating possible foraging behavior at night. A home range (1.7 km2) was calculated for one animal. Daily asymptotes in space used were reached for all other tracks suggesting daily activity spaces were determined despite relatively short tracking durations. Bays, estuaries, and other discrete coastal habitats are highly productive and serve as nurseries for a variety of marine fishes. Nurseries are particularly crucial for batoids whose life histories are dependent on rapid growth in the first year, and they may be especially important for rare or endangered species within the group. The smalltooth sawfish, Pristis pectinata, are an endangered marine elasmobranch that makes use of specific nurseries in southwest Florida. While habitat and environmental parameters have been described within the nursery, specific characteristics of the habitats, such as mangrove morphology and sediment types associated with habitat use have not been identified. Two mangrove characteristics (prop root density and limb overhang) and two sediment characteristics (percent organic and percent silt) were used as independent variables to construct a habitat model. Acoustic monitoring was used to examine long term (weeks or months) patterns in habitat use in nursery areas during the critical first year of life. Twenty young-of-the-year sawfish were acoustically tagged between April and October of 2011, and detected by an array of 32 VEMCO VR2w receivers in a documented nursery within Everglades National Park. Presence in the array for individual smalltooth sawfish ranged from one day to 197 days, and overall P. pectinata were present within the acoustic array for 334 days. There was also evidence of overwintering specifically in Chokoloskee Bay. In the back water region (Turner River, Mud Bay, Cross Bays, Wilderness Waterway, and Lopez River), residency times were longer in tidal bays rather than creeks or rivers. A potential emigration corridor from the back water region was observed through the Lopez River. Using receiver data for animals moving between neighboring areas, a step wise logistic regression model in a generalized linear model framework for receiver hits per hour was significant for mangrove prop root density (Stepwise GLM- Partial R square = 0.22, C(p) = 6.02 p = 0.023). This model indicated a higher probability of seeing a juvenile smalltooth sawfish when mangrove prop root density was high.
Author: United States. National Marine Fisheries Service. Endangered Species Act Interagency Cooperation Division Publisher: ISBN: Category : Marine resources conservation Languages : en Pages : 56
Book Description
"Smalltooth sawfish research permits have been issued for similar research in the same action area under Permit Nos. 1352, 1475, 1538, 13330, 15802, 17316, and 17787. This permit is an extension of previous work, initiated in 2004 under Permit No. 1475 and continued under Permit No. 15802. The research proposed under this permit has been evaluated in all of these previous permits and is not new or being conducted in ways that differ from previous assessments. Past analyses have found that these research techniques are likely to adversely affect listed species, but are not likely to jeopardize their continued existence"--Page 2. [Consultation Tracking number: FPR-2017-9202]. [doi:10.7289/V5GH9G4M (https://doi.org/10.7289/V5GH9G4M)].
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Author: Gregg Richard Poulakis
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Author: John Keith Carlson
Author: David B. Snyder
Author: Rachel Marie Scharer
Author: Peter Last
Author: Lisa Hollensead
Author: United States. National Marine Fisheries Service. Endangered Species Act Interagency Cooperation Division