Effects of the upwelling system on the assessment of reproductive parameters of the caridean shrimp Nematopalaemon schmitti (Holthuis, 1950) in the Western Atlantic

2021 ◽  
Author(s):  
Daphine R. Herrera ◽  
Thiago Maia Davanso ◽  
Rogerio C. Costa
Keyword(s):  
Reproductive Parameters ◽  
Caridean Shrimp ◽  
Western Atlantic ◽  
Upwelling System

The reproductive cycle of the smooth skate, Malacoraja senta, in the Gulf of Maine

2007 ◽  
Vol 58 (1) ◽  
pp. 98 ◽  
Author(s):  
James A. Sulikowski ◽  
Scott Elzey ◽  
Jeff Kneebone ◽  
Joe Jurek ◽  
W. Huntting Howell ◽  
...  
Keyword(s):  
Reproductive Cycle ◽  
Gulf Of Maine ◽  
Gonadosomatic Index ◽  
Management Plan ◽  
Biological Data ◽  
Hepatosomatic Index ◽  
Reproductive Parameters ◽  
Western Atlantic ◽  
The North ◽  
Gland Weight

The smooth skate (Malacoraja senta) is a small species of skate that is native to the waters of the north-western Atlantic. Recent assessments in the Gulf of Maine indicate that the biomass of smooth skates has declined below threshold levels mandated by the Sustainable Fisheries Act. This decline, coupled with the paucity of biological data, has prompted the National Marine Fisheries Service to prohibit the possession of smooth skates in this region. Consequently, crucial life history information is now being collected, which could be used in the formulation of a management plan. The present study describes and characterises the reproductive cycle of female and male smooth skates, based on monthly samples taken off the coast of New Hampshire, USA, from May 2001 to April 2002. Gonadosomatic index (GSI), hepatosomatic index (HSI), shell gland weight, follicle size and egg case formation were assessed for 79 female skates. In general, these reproductive parameters remained relatively constant throughout most of the year. Additionally, the size distribution of ovarian follicles in females captured each month did not vary significantly. For males (n = 81), histological stages of spermatogenesis III to VI (SIII-SVI), GSI and HSI were examined. No significant differences were detected in male reproductive parameters, and production and maintenance of mature spermatocysts within the testes were observed throughout the year. Collectively, these findings indicate that, like other north Atlantic skate species, the smooth skate is reproductively active year-round.

Western Atlantic Species of the Caridean Shrimp Genus Ogyrides

1981 ◽  
Vol 1 (1) ◽  
pp. 143-147 ◽  
Author(s):  
Austin B. Williams
Keyword(s):  
Caridean Shrimp ◽  
Western Atlantic

Occurrence and biogeographic significance of Heliaster (Echinodermata: Asteroidea) from the Pliocene of southwest Florida

1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell
Keyword(s):  
Central American ◽  
Eastern Pacific ◽  
Whole Body ◽  
Marine Fauna ◽  
Western Atlantic ◽  
Southwest Florida ◽  
Extant Species ◽  
Geologic Record ◽  
Central American Isthmus

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.

Acetate-utilizing microbial communities revealed by stable-isotope probing in sediment underlying the upwelling system of the Ulleung Basin, East Sea

2020 ◽  
Vol 634 ◽  
pp. 45-61
Author(s):  
H Cho ◽  
B Kim ◽  
JS Mok ◽  
A Choi ◽  
B Thamdrup ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Microbial Communities ◽  
Stable Isotope Probing ◽  
East Sea ◽  
Ulleung Basin ◽  
Upwelling System

EFFECTS OF DIFFERENT LEVELS OF PROTECTED L-CARNITINE ON MILK PRODUCTION, METABOLISM, AND REPRODUCTIVE PARAMETERS OF HIGH-PERFORMANCE DAIRY COWS

2018 ◽  
Vol 53 (6) ◽  
pp. 1169-1179
Author(s):  
M.G. Chabaev ◽  
◽  
R.V. Nekrasov ◽  
V.N. Romanova ◽  
◽  
...  
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
High Performance ◽  
Reproductive Parameters ◽  
Different Levels

Some Reproductive Parameters of an Estuarine Population of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus)

2008 ◽  
Vol 34 (1) ◽  
pp. 84-92 ◽  
Author(s):  
Aude Steiner ◽  
Mike Bossley
Keyword(s):  
Bottlenose Dolphins ◽  
Reproductive Parameters ◽  
Tursiops Aduncus

Modeling the Central California Coastal Upwelling System: Physics, Ecosystems and Resource Management

2002 ◽  
Author(s):  
Francisco P. Chavez ◽  
Richard T. Barber ◽  
Fei Chai ◽  
Yi Chao ◽  
Andrew P. De Vogelaere ◽  
...  
Keyword(s):  
Resource Management ◽  
Coastal Upwelling ◽  
Central California ◽  
Upwelling System
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