The biology of Gammarus (Crustacea, Amphipoda) in the northwestern Atlantic. V. Gammarus oceanicus Segerstråle

1972 ◽  
Vol 50 (6) ◽  
pp. 801-813 ◽  
Author(s):  
V. J. Steele ◽  
D. H. Steele
Keyword(s):  
Body Length ◽  
Long Island ◽  
Reproductive Potential ◽  
Long Island Sound ◽  
Size At Maturity ◽  
Foxe Basin ◽  
Large Size ◽  
Mean Size ◽  
Long Life ◽  
Island Sound

Gammarus oceanicus is an intertidal species found between Long Island Sound and southern Foxe Basin in the northwestern Atlantic. Fifty percent maturity of the females is attained at 11 and 13.8 mm body length in the January–May and June–August periods, respectively, at Holyrood, Nfld., and at 11.4 and 13.7 mm at St. Andrews, N.B. In the laboratory females matured in the 13th molt at a mean size of 12 mm in an average of 329 and 230 days at 3 and 12 °C, respectively. Females produce successive broods except between August and November when they enter the resting stage. Relatively few young are released in the winter months. Fecundity increases with the size of the female and the large size at maturity, continued growth, and long life give this species a high reproductive potential.

Changes in female lobster (Homarus americanus) size at maturity and implications for the lobster resource in Long Island Sound, Connecticut

2001 ◽  
Vol 52 (8) ◽  
pp. 1283 ◽  
Author(s):  
Donald F. Landers Jr ◽  
Milan Keser ◽  
Saul B. Saila
Keyword(s):  
Sexual Maturity ◽  
Egg Production ◽  
Long Island ◽  
Homarus Americanus ◽  
Long Island Sound ◽  
Female Size ◽  
Size At Maturity ◽  
Size At Sexual Maturity ◽  
Average Size ◽  
Island Sound

Population theory predicts that, under conditions of high age/size-specific mortality rates, individuals in highly exploited populations increase their fitness by decreasing size at sexual maturity, relative to less exploited populations. The benefit of early reproductive maturation is that individuals have a higher probability of surviving to maturity and contributing progeny to maintain the population. Empirical evidence, based on morphometric data from nearly 60 000 female lobsters collected since 1981, suggests that size at sexual maturity of female lobsters in Long Island Sound (USA) has recently decreased. Our findings were supported by decreases in average size and increases in abundance of egg-bearing females over the past two decades. Changes in female size at maturity and subsequent higher egg production may also help to explain the recent increase in lobster recruitment and landings. It is unclear whether these changes were caused by density-dependent factors related to the high exploitation of the species, by natural environmental factors (e.g. higher seawater temperatures), or a combination of the two.

Surficial geology of the sea floor in Long Island Sound offshore of Plum Island, New York

2010 ◽  
Author(s):  
K.Y. McMullen ◽  
L.J. Poppe ◽  
W.W. Danforth ◽  
D.S. Blackwood ◽  
J.D. Schaer ◽  
...  
Keyword(s):  
New York ◽  
Long Island ◽  
Long Island Sound ◽  
Sea Floor ◽  
Surficial Geology ◽  
Island Sound

Sea-floor geology and topography offshore in northeastern Long Island Sound

2013 ◽  
Author(s):  
L.J. Poppe ◽  
K.Y. McMullen ◽  
S.D. Ackerman ◽  
K.A. Glomb
Keyword(s):  
Long Island ◽  
Long Island Sound ◽  
Sea Floor ◽  
Island Sound

Sea-floor character and geology off the entrance to the Connecticut River, northeastern Long Island Sound

2013 ◽  
Author(s):  
Lawrence J. Poppe ◽  
Katherine Y. McMullen ◽  
Seth D. Ackerman ◽  
Megan R. Guberski ◽  
Douglas A. Wood
Keyword(s):  
Long Island ◽  
Long Island Sound ◽  
Connecticut River ◽  
Sea Floor ◽  
Island Sound
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