TY - JOUR
T1 - Life cycle characteristics and reproductive patterns of idotea spp. (Isopoda) in the limfjord, Denmark
AU - Kroer, Niels
PY - 1989/1/1
Y1 - 1989/1/1
N2 - The life cycles and reproductive traits of Idotea baltica and I. chelipes in the Limfjord, Denmark were studied. The species had two annual generations of breeding females. However, while the first generation of I. baltica produced one or two broods that of I. chelipes had two or three. The second generations were only ovigerous once. The number and size of stage 1 eggs of both species were proportional to the length of the parent female. The relationships changed during the breeding period, and in early summer the overwintered females carried many small eggs compared to the few and large ones of the later, second generation. The reproductive effort of I. baltica females was greatest in early summer, whereas it remained constant in the case of I. chelipes. The breeding biology of the two species from other geographical areas is compared with the present findings.
AB - The life cycles and reproductive traits of Idotea baltica and I. chelipes in the Limfjord, Denmark were studied. The species had two annual generations of breeding females. However, while the first generation of I. baltica produced one or two broods that of I. chelipes had two or three. The second generations were only ovigerous once. The number and size of stage 1 eggs of both species were proportional to the length of the parent female. The relationships changed during the breeding period, and in early summer the overwintered females carried many small eggs compared to the few and large ones of the later, second generation. The reproductive effort of I. baltica females was greatest in early summer, whereas it remained constant in the case of I. chelipes. The breeding biology of the two species from other geographical areas is compared with the present findings.
UR - http://www.scopus.com/inward/record.url?scp=0008025645&partnerID=8YFLogxK
U2 - 10.1080/00785326.1989.10430837
DO - 10.1080/00785326.1989.10430837
M3 - Journal article
AN - SCOPUS:0008025645
VL - 30
SP - 63
EP - 74
JO - Marine Biology Research
JF - Marine Biology Research
SN - 1745-1000
IS - 1
ER -