Discovery of Brachiella lageniformis (Copepoda: Lernaeopodidae) in the Canadian Pacific and its Significance to Zoogeography of the Genus Merluccius (Pisces: Teleostei)

1970 ◽  
Vol 27 (12) ◽  
pp. 2159-2165 ◽  
Author(s):  
Z. Kabata
Keyword(s):  
East Coast ◽  
Atlantic Coast ◽  
Vancouver Island ◽  
Male And Female ◽  
Merluccius Productus

Brachiella lageniformis, hitherto known only from the Atlantic coast of Argentina, was found off the east coast of Vancouver Island, on the gills of Merluccius productus. Both male and female are described and illustrated in detail. The significance of this find for Szidat's views on the origin of the genus Merluccius is discussed. A proposal is made to suppress the genus Parabrachiella and to place all its five species (P. rostrata, P. insidiosa, P. australis, P. spinicephala, and P. incurva) in the genus Brachiella.

Relationships between temperature and Pacific hake distribution vary across latitude and life-history stage

2020 ◽  
Vol 639 ◽  
pp. 185-197 ◽  
Author(s):  
MJ Malick ◽  
ME Hunsicker ◽  
MA Haltuch ◽  
SL Parker-Stetter ◽  
AM Berger ◽  
...  
Keyword(s):  
Life History ◽  
Environmental Effects ◽  
Environmental Conditions ◽  
Vancouver Island ◽  
Additive Models ◽  
Life History Stage ◽  
Fish Stocks ◽  
Merluccius Productus ◽  
Multiple Dimensions ◽  
Effects Of Temperature

Environmental conditions can have spatially complex effects on the dynamics of marine fish stocks that change across life-history stages. Yet the potential for non-stationary environmental effects across multiple dimensions, e.g. space and ontogeny, are rarely considered. In this study, we examined the evidence for spatial and ontogenetic non-stationary temperature effects on Pacific hake Merluccius productus biomass along the west coast of North America. Specifically, we used Bayesian additive models to estimate the effects of temperature on Pacific hake biomass distribution and whether the effects change across space or life-history stage. We found latitudinal differences in the effects of temperature on mature Pacific hake distribution (i.e. age 3 and older); warmer than average subsurface temperatures were associated with higher biomass north of Vancouver Island, but lower biomass offshore of Washington and southern Vancouver Island. In contrast, immature Pacific hake distribution (i.e. age 2) was better explained by a nonlinear temperature effect; cooler than average temperatures were associated with higher biomass coastwide. Together, our results suggest that Pacific hake distribution is driven by interactions between age composition and environmental conditions and highlight the importance of accounting for varying environmental effects across multiple dimensions.

scholarly journals Total mercury concentrations in invasive lionfish (Pterois volitans/miles) from the Atlantic coast of Florida

2020 ◽  
Author(s):  
Eric G. Johnson ◽  
Angelina Dichiera ◽  
Danielle Goldberg ◽  
MaryKate Swenarton ◽  
James Gelsleichter
Keyword(s):  
Total Mercury ◽  
East Coast ◽  
Trophic Position ◽  
Atlantic Coast ◽  
Marine Fishes ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Significant Barrier ◽  
Invasive Lionfish ◽  
Mercury Bioaccumulation

ABSTRACTInvasive lionfish (Pterois volitans/miles) pose a serious threat to marine ecosystems throughout the western Atlantic Ocean and Caribbean Sea. The development of a fishery for lionfish has been proposed as a strategy for controlling populations; however, there is concern about consumption of this species by humans due to its high trophic position and potential for bioaccumulation of mercury. We analyzed total mercury (THg) in tissues of lionfish from two locations on the east coast of Florida. THg in lionfish increased with size and differed by location and sex. THg was highest in muscle tissue and was strongly positively correlated among tissues. THg in lionfish was lower than other commonly consumed marine fishes, and falls into Florida’s least restrictive advisory level. Consumption of lionfish poses a low risk and concerns over mercury bioaccumulation should not present a significant barrier to lionfish harvest.

Aporocotyle margolisi n.sp. (Digenea: Aporocotylidae) from Merluccius productus

1967 ◽  
Vol 24 (8) ◽  
pp. 1763-1773 ◽  
Author(s):  
John W. Smith
Keyword(s):  
Vancouver Island ◽  
Merluccius Productus ◽  
Bulbus Arteriosus

Aporocotyle margolisi n.sp., from the bulbus arteriosus of Merluccius productus (Ayres) caught off Vancouver Island, is described and figured. Records of Aporocotyle from other hosts are discussed.

Shark Nursery Grounds of the Gulf of Mexico and the East Coast Waters of the United States

2007 ◽  
Keyword(s):  
United States ◽  
Gulf Of Mexico ◽  
East Coast ◽  
Gulf Coast ◽  
Atlantic Coast ◽  
The United States ◽  
Shark Species ◽  
Carcharhinus Plumbeus ◽  
Nursery Areas ◽  
Pesticide Metabolites

<em>Abstract.</em>—Because of their tendency to accumulate in estuaries and coastal regions, organochlorine (OC) contaminants such as pesticides and polychlorinated biphenyls (PCBs) represent potential threats to the quality of essential fish habitat for many shark species. These compounds pose special risks to immature sharks in particular because of their ability to impair growth and sexual maturation in juvenile fish at environmentally relevant levels of exposure. In order to assess the extent of these risks in shark populations on the East Coast of the United States, the present study examined concentrations of 30 OC pesticides/pesticide metabolites and total PCBs in juvenile sandbar <em>Carcharhinus plumbeus </em>and blacktip <em>C. limbatus </em>sharks from seven major nursery areas in the western Atlantic Ocean and eastern Gulf of Mexico. Quantifiable levels of PCBs and 13 OC pesticides/ pesticide metabolites were detected via gas chromatography and mass spectrometry in liver of 25 young-of-the-year blacktip sharks from the southeastern U.S. Atlantic coast and three regions on Florida’s gulf coast: Cedar Key, Tampa Bay, and Charlotte Harbor. Similarly, quantifiable levels of PCBs and 14 OC pesticides/metabolites were detected in 23 juvenile <em>C. plumbeus </em>from three sites on the northeastern U.S. coast: middle Delaware Bay, lower Chesapeake Bay, and Virginia’s eastern shore. Liver OC concentrations in Atlantic sandbar and blacktip sharks were higher than expected and, in some cases, comparable with elevated levels observed in deep-sea and pelagic sharks. Although significantly lower than those observed in Atlantic sharks, pesticide and PCB levels in Florida blacktip sharks were similar to, if not greater than, OC concentrations reported in adults of other coastal shark species. Based on these data, OC contamination appears to pose significant threats to habitat quality in sandbar and blacktip shark nursery areas on the U.S. Atlantic coast.

Notes on Polychaeta from the East Coast of Vancouver Island and from Adjacent Waters, with a Description of a New Species of Aricidea

1956 ◽  
Vol 13 (4) ◽  
pp. 541-546 ◽  
Author(s):  
E. Berkeley ◽  
C. Berkeley
Keyword(s):  
New Species ◽  
North America ◽  
East Coast ◽  
Vancouver Island ◽  
Western Canada ◽  
Western North America ◽  
A New Species

Records are given of two species and a variety new to western Canada and notes on three other species already known from the region. A new species, Aricidea lopezi, and four species new to western North America, are described from the neighbourhood of Friday Harbour, Washington.

The Nutritive Value of Marine Products: X. Proximate Analysis of Ling Cod

1936 ◽  
Vol 2 (5) ◽  
pp. 461-462
Author(s):  
F. D. White
Keyword(s):  
Nutritive Value ◽  
East Coast ◽  
Vancouver Island ◽  
Proximate Analysis ◽  
Ophiodon Elongatus ◽  
Marine Products ◽  
Ling Cod ◽  
Proximate Analyses

Separate proximate analyses of the flesh and skin of three freshly-caught ling cod (Ophiodon elongatus) from the east coast of Vancouver island are reported. Average percentages of protein in the flesh and skin were 18.1 and 26.9 (moist) or 87.0 and 88.5 (dry); ash, 1.2 and 2.5 (moist); fat, negligible; Calories per 100 g. (moist), 81 and 117.

HEIGHT GROWTH LOSSES DUE TO ANIMAL FEEDING IN DOUGLAS FIR PLANTATIONS, VANCOUVER ISLAND, B.C.

1964 ◽  
Vol 40 (3) ◽  
pp. 298-307 ◽  
Author(s):  
K. J. Mitchell
Keyword(s):  
Pseudotsuga Menziesii ◽  
East Coast ◽  
Growth Curves ◽  
Tree Height ◽  
Vancouver Island ◽  
Height Growth ◽  
Douglas Fir ◽  
Average Height ◽  
Animal Feeding ◽  
Rotation Age

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) plantations on the east coast of Vancouver Island, British Columbia, were examined to determine the effect of animal feeding upon height growth.Length of internodes and evidence of past leader damage were recorded and cumulative average height-age growth curves compared for undamaged trees and for trees suffering various intensities of damage.The average reduction in tree height attributable to animal feeding in heavily browsed plantations varied from one-half to two feet over a period of 8 to 10 years. It is unlikely that either tree volume or quality at rotation age would be seriously affected.Exposed trees were browsed more heavily than those protected by vegetation or logging slash.

A new species of Leuckartiara (Pandeidae, Hydrozoa) from the east coast of Vancouver Island

1980 ◽  
Vol 58 (8) ◽  
pp. 1491-1493
Author(s):  
Mary Needler Arai ◽  
Anita Brinckmann-Voss
Keyword(s):  
New Species ◽  
East Coast ◽  
Vancouver Island ◽  
A New Species

A new species of Leuckartiara, Leuckartiara foersteri n.sp., is described and illustrated. It is differentiated from all other species of the genus by marginal tentacles without abaxial spurs, and gonads with parallel folds, situated on adradial sides of cross-shaped manubrium with no distinct interradial connection.

scholarly journals Total mercury concentrations in invasive lionfish (Pterois volitans/miles) from the Atlantic coast of Florida

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0234534
Author(s):  
Eric G. Johnson ◽  
Angelina Dichiera ◽  
Danielle Goldberg ◽  
MaryKate Swenarton ◽  
James Gelsleichter
Keyword(s):  
Total Mercury ◽  
East Coast ◽  
Trophic Position ◽  
Atlantic Coast ◽  
Marine Fishes ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Significant Barrier ◽  
Invasive Lionfish ◽  
Mercury Bioaccumulation

Invasive lionfish (Pterois volitans/miles) pose a serious threat to marine ecosystems throughout the western Atlantic Ocean and Caribbean Sea. The development of a fishery for lionfish has been proposed as a strategy for controlling populations; however, there is concern about consumption of this species by humans due to its high trophic position and potential for bioaccumulation of mercury. We analyzed total mercury (THg) in tissues of lionfish from two locations on the east coast of Florida. THg in lionfish increased with size and differed by location and sex. THg was highest in muscle tissue and was strongly positively correlated among tissues. THg in lionfish was lower than other commonly consumed marine fishes, and falls into Florida’s least restrictive advisory level. Consumption of lionfish poses a low risk and concerns over mercury bioaccumulation should not present a significant barrier to lionfish harvest.

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