New and Rare Records of Fishes from Labrador

Drummond, James; Wollaston, F.L.S. T. Vernon; Yate, James; Samuel, C T; Rudolph, Heinrich

doi:10.2307/1438314

Cited by 17 publications

(5 citation statements)

References 5 publications

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“…Significant interest and activity was generated with respect to this problem of survival in cold marine waters by a question posed to P. F. Scholander by R. H. Backus, an ichthyologist who had worked in Laborador (Backus 1951): ''When Arctic fishes swim about in ice water at -1.7°to -1.8°, why don't they freeze? Do they have twice as high an osmotic concentration as ordinary fishes, or what is the story?''…”

Section: Teleost Fishes In Cold Marine Watersmentioning

confidence: 99%

Environmental influences on regulation of blood plasma/serum components in teleost fishes: a review

Nordlie

2009

Rev Fish Biol Fisheries

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Concentrations of both inorganic and organic blood plasma/serum components of teleost fishes were reviewed in seven habitat/life-history categories. These were: freshwater; inland saline; estuarine and nearshore marine; pelagic and deepsea; diadromous; southern cold-water; and northern cold-water. Plasma/serum osmolalities were compared among groups acclimated to/living in fresh and in salt water. Contributions of inorganic ions and colligative and non-colligative organic molecules were evaluated including with respect to melting and freezing points, and ''antifreeze activity'' of plasma/serum in species from cold marine waters. Possible roles of TMAO in deep-water fishes were reviewed. Discussion also included influences of ambient salinity and temperature on concentrations of plasma/serum components. Seasonal cycles of blood plasma/serum components were discussed, along with antifreeze concentrations in other body fluids and tissues of cold-water fishes. Regulatory patterns of plasma/serum osmolalities were compared among the most euryhaline of teleosts evaluated here. Highest mean values of plasma/serum osmolalities in sea water were seen in southern cold-water and in pelagic and deep-sea fishes. The southern cold-water group also had the lowest plasma/serum freezing points among these groups. Comparisons of mean plasma/serum Na ? and Cl -concentrations among fishes from fresh waters did not differ significantly among groups, but species from cold marine waters showed higher levels than did other groups in marine waters. Plasma/serum osmotic, Na ? and Cl -concentrations of these seven groups of teleosts were compared with those of other fish-like vertebrate groups. Possible impacts of global warming on regulatory responses of plasma/serum components were discussed.

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Section: Teleost Fishes In Cold Marine Watersmentioning

confidence: 99%

Environmental influences on regulation of blood plasma/serum components in teleost fishes: a review

Nordlie

2009

Rev Fish Biol Fisheries

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“…The Atlantic subspecies of sturgeon, Acipenser oxyrhynchus oxyrhynchus, is distributed from Labrador to north Florida, with strays reported from central Florida during exceptionally cold weather (Backus 1951, Bigelow and Schroeder 1953, Wooley and Crateau 1985. The Gulf subspecies, A. oxyrhynchus desotoi, is historically recorded from the Mississippi River to central Florida, but has also been observed at the southern tip of the peninsula in cold weather (Vladykov andGreeley 1963, Wooley andCrateau 1985).…”

Section: Atlantic Sturgeonmentioning

confidence: 99%

Genetic structure of Atlantic and Gulf of Mexico populations of sea bass, menhaden, and sturgeon: Influence of zoogeographic factors and life-history patterns

1990

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Abstract.To assess the influence of zoogeographic factors and life-history parameters (effective population size, generation length, and dispersal) on the evolutionary genetic structure of marine fishes in the southeastern USA, phylogeographic patterns of mitochondrial DNA (mtDNA) were compared between disjunct Atlantic and Gulf of Mexico populations in three coastal marine fishes whose juveniles require an estuarine or freshwater habitat for development. Black sea bass (Centropristis striata), menhaden (Brevoortia tyrannus and B. patronus) and sturgeon (Acipenser oxyrhynchus) samples were collected between 1986 and 1988. All species showed significant haplotype frequency differences between the Atlantic and Gulf, but the magnitude and distribution of mtDNA variation differed greatly among these taxa: sea bass showed little within-region mtDNA polymorphism and a clear phylogenetic distinction between the Atlantic and Gulf; menhaden showed extensive within-region polymorphism and a paraphyletic relationship between Atlantic and Gulf populations; and sturgeon exhibited very low mONA diversity both within regions and overall. Evolutionary effective sizes of the female populations (N:(e)) estimated from the mtDNA data ranged from N:(e) = 50 (Gulf of Mexico sturgeon) to N:(e) = 800 000 (Atlantic menhaden), and showed a strong rank-order agreement with the current-day census sizes of these species. The relationship between N:(e) and the estimated times of divergence (t) among mtDNA lineages (from conventional clock calibrations) predicts the observed phylogenetic distinction between Atlantic and Gulf sea bass, as well as the paraphyletic pattern in menhaden, provided the populations have been separated by the same long-standing zoogeographic barriers thought to have influenced other coastal taxa in the southeastern USA. However, vicariant scenarios alone cannot explain other phylogenetic aspects of the menhaden (and sturgeon) mtDNA data and, for these species, recent gene flow between the Atlantic and Gulf coasts is strongly implicated. These data are relevant to management and conservation issues for these species.

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“…Atlantic Sturgeon historically occupied major river systems between Hamilton Inlet, Labrador, Canada (Backus 1951), and the St. Johns River, Florida (Vladykov and Greeley 1963). Atlantic Sturgeon spend the vast majority of their life in coastal marine waters, but little is known about this phase in their life history (Atlantic Sturgeon Status Review Team 2007).…”

Section: Atlantic Sturgeonmentioning

confidence: 99%

Shrinking the Haystack: Using an AUV in an Integrated Ocean Observatory to Map Atlantic Sturgeon in the Coastal Ocean

et al. 2013

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Encogiendo el pajar: utilización de un Vehículo Autónomo Submarino en un Observatorio Oceánico Integral para Mapear el Esturión del Atlántico en el Océano Costero RESUMEN: los procesos físicos que ocurren en zona costera del Atlántico medio generan un paisaje complejo y dinámico. La comprensión de cómo los peces costeros responden a tal complejidad ha sido una motivación importante para establecer un arreglo de biotelemetría en la franja costera. Muchos de los arreglos costeros maximizan la probabilidad de detectar peces mediante el uso de hidrófonos cerca de los cuellos de botella geofísicos. El desarrollo de un observatorio oceánico de monitoreo en tiempo real permite un mapeo sincrónico de estructuras hidrográficas dinámicas que son relevantes para los peces costeros. Estas observaciones bindan el contexto para interpretar el impacto que tienen ciertos rasgos oceanográfi-cos en el comportamiento de animales rastreados mediante telemetría. En una misión diseñada para probar este concepto, se desplegó el deslizador Slocum en un observatorio oceánico para demostrar cómo los aparatos móviles de monitoreo pueden ser reubicados de forma dinámica en respuesta a procesos físicos de mesoescala que ocurren en el océano costero. El deslizador Slocum detectó cuatro especímenes de esturión del Atlántico Acipencer oxyrinchus oxyrinchus encontrados en una masa de agua fresca, somera y relativamente cálida en una región en la que históricamente el esturión del Atlántico ha sido parte de la captura incidental.ABSTRACT: Physical processes in the coastal Mid-Atlantic create a complex and dynamic seascape. Understanding how coastal fishes respond to this complexity has been a major motivation in establishing coastal biotelemetry arrays. Most coastal arrays maximize the probability of fish detection by positioning hydrophones near geophysical bottlenecks. The development of a real-time ocean observatory allows for synchronous mapping of dynamic hydrographic structures important to coastal fishes. These observations provide important context for interpreting the impact of oceanographic features on the behavior of telemetered animals. In a proof-of-concept mission, we deployed a Slocum glider in a real-time ocean observatory to demonstrate how mobile listening assets could be dynamically reallocated in response to the mesoscale physics of the coastal ocean. The Slocum glider detected four Atlantic Sturgeon Acipencer oxyrinchus oxyrinchus that were in a shallow, well-mixed, and relatively warm and fresh water mass in a region of historic Atlantic Sturgeon bycatch.

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New and Rare Records of Fishes from Labrador

Cited by 17 publications

References 5 publications

Environmental influences on regulation of blood plasma/serum components in teleost fishes: a review

Environmental influences on regulation of blood plasma/serum components in teleost fishes: a review

Genetic structure of Atlantic and Gulf of Mexico populations of sea bass, menhaden, and sturgeon: Influence of zoogeographic factors and life-history patterns

Shrinking the Haystack: Using an AUV in an Integrated Ocean Observatory to Map Atlantic Sturgeon in the Coastal Ocean

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