Life History and Ecology of the Freshwater Caridean Shrimp, Palaemonetes paludosus (Gibbes)

1976 ◽  
Vol 96 (1) ◽  
pp. 52 ◽  
Author(s):  
J. Thomas Beck ◽  
Bruce C. Cowell
Keyword(s):  
Life History ◽  
Caridean Shrimp

Kronbrogia pugettensis sp. nov. (Neorhabdocoela: Fecampiidae), an endoparasitic turbellarian infesting the shrimp Heptacarpus kincaidi (Rathbun), with notes on its life-history

Parasitology ◽  
1985 ◽  
Vol 91 (3) ◽  
pp. 431-447 ◽  
Author(s):  
G. L. Shinn ◽  
A. M. Christensen
Keyword(s):  
Life History ◽  
North America ◽  
Western Coast ◽  
Caridean Shrimp ◽  
Island Region ◽  
New Host ◽  
Egg Capsules ◽  
Reproductive Gland ◽  
Swimming Larva ◽  
Free Swimming Larva

SUMMARYThe morphology of Kronborgia pugettensis sp. nov., an endoparasite from the haemocoele of the caridean shrimp Heptacarpus kincaidi is described from specimens collected in the San Juan Island region of the western coast of North America. Members of this species are unisexual as are other members of the genus, but only females were found. An ootype and a type of accessory reproductive gland not known from other Kronborgia spp, are described, but they are probably present in other members of the genus. The life-history is similar to that of other Kronborgia spp. After the female reaches maturity, it emerges from the host and secretes a tubiform cocoon around itself and deposits its egg capsules within it. Embryogenesis lasts about 4 months. A free-swimming larva locates the new host, attaches to its exterior, and secretes a cyst around itself. It then penetrates through the exoskeleton to reach the haemocoele. K. pugettensis is easily distinguished from other members of the genus by the shape of the cocoon, type of host, and geographic distribution. This is the second species of fecampiid described from North America, but several undescribed species are known to exist from their cocoons.

Interrelationships of factors of social development are more complex than Life History Theory predicts

2019 ◽  
Vol 42 ◽  
Author(s):  
Boris Kotchoubey
Keyword(s):  
Life History ◽  
Social Development ◽  
Life History Theory ◽  
Strong Correlations ◽  
Behavioral Features

Abstract Life History Theory (LHT) predicts a monotonous relationship between affluence and the rate of innovations and strong correlations within a cluster of behavioral features. Although both predictions can be true in specific cases, they are incorrect in general. Therefore, the author's explanations may be right, but they do not prove LHT and cannot be generalized to other apparently similar processes.

New data on the life history and ecology of the deep-sea hooked squid Taningia danae

Sarsia ◽  
2003 ◽  
Vol 88 (4) ◽  
pp. 297-301 ◽  
Author(s):  
Guerra A. ◽  
Rocha F. ◽  
A. F. González
Keyword(s):  
Life History ◽  
Deep Sea
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