The biology of Gammarus (Crustacea, Amphipoda) in the northwestern Atlantic. X. Gammarus finmarchicus Dahl

1975 ◽  
Vol 53 (8) ◽  
pp. 1110-1115 ◽  
Author(s):  
D. H. Steele ◽  
V. J. Steele

Gammarus finmarchicus is an amphi-Atlantic species. In the western Atlantic it is found from the island of St. Pierre south to Long Island Sound. At St. Andrews, New Brunswick, 50% maturity occurs at 10.5 mm in the females. Reproduction is in progress throughout the year, but small females evidently are in a resting condition during September–October before breeding. The release of young by the population is greater in the spring, summer, and early autumn than it is in late autumn and winter. The young released in the spring and summer do not reproduce until the next year so that the life cycle is annual.

1947 ◽  
Vol 20 (2) ◽  
pp. 278
Author(s):  
Peter Oliver ◽  
Robert F. Duncan ◽  
Fessenden S. Blanchard

1973 ◽  
Vol 51 (7) ◽  
pp. 723-728 ◽  
Author(s):  
D. H. Steele ◽  
V. J. Steele

Calliopius laeviusculus is an amphiboreal species found on rocky shores in the western Atlantic from Hudson Bay south to Long Island Sound. Fifty percent of the females were calculated to be mature at 5.6 and 6.7 mm in the summer and winter respectively in Newfoundland waters, but, in Labrador, maturity was not achieved in females up to 10 mm in length. In Newfoundland several generations are produced per year and the females may have more than one brood. However, the females are in the resting stage between August and November–December and young are only released from spring until late summer. The overwintering animals are larger than those found in the summer and the population reaches a peak in late summer. In Labrador, where only one generation is produced per year, young are released in the spring but probably do not reach maturity until the autumn. In Newfoundland fecundity does not vary seasonally.


Author(s):  
K.Y. McMullen ◽  
L.J. Poppe ◽  
W.W. Danforth ◽  
D.S. Blackwood ◽  
J.D. Schaer ◽  
...  

2013 ◽  
Author(s):  
L.J. Poppe ◽  
K.Y. McMullen ◽  
S.D. Ackerman ◽  
K.A. Glomb

2013 ◽  
Author(s):  
Lawrence J. Poppe ◽  
Katherine Y. McMullen ◽  
Seth D. Ackerman ◽  
Megan R. Guberski ◽  
Douglas A. Wood

Sign in / Sign up

Export Citation Format

Share Document