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Laboratory study of effects of temperature and salinity on survival and larval development of a population ofRhithropanopeus harrisiifrom the Mondego River estuary, Portugal

✍ Scribed by F. Gonçalves; R. Ribeiro; A. M. V. M. Soares

Publisher
Springer-Verlag
Year
1995
Tongue
English
Weight
522 KB
Volume
121
Category
Article
ISSN
0025-3162

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✦ Synopsis

Rhithropanopeus harrisii (Gould) is an introduced species in the estuary of the Mondego River (Portugal); it was first recorded from the Iberian Peninsula in 1989. The larval development of this population was studied under laboratory conditions at different temperatures and salinities, and showed a larval development pattern very similar to that reported for American estuarine populations of this species. Larval development was negatively correlated with temperature. Time to megalopa varied between 7 and 35 d; the first crab (C1) was reached after a maximum of 11 to 43 d. Larval development was optimum at 25~ and 15%~S. Larval survival was maximum at 10, 15 and 20%oS at all three temperatures studied (20, 25 and 30~

The percentage of abnormal megalopae increased with increasing salinity to a maximum (100%) at 30%~S; incidence of abnormality was not affected by temperature.

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The effect of salinity and cyclic temper
The effect of salinity and cyclic temperature on larval development of the mud-crabRhithropanopeus harrisii(Brachyura: Xanthidae) reared in the laboratory
✍ M. E. Christiansen; J. D. Costlow 📂 Article 📅 1975 🏛 Springer-Verlag 🌐 English ⚖ 622 KB

Larvae of Rhithropanopeus harrisii (Gould) were reared from hatching to the first or second crab stages in 11 combinations of salinities and cyclic temperatures (5, 20, and 35~ S at 20 ~ to 25oc, 250 to 3OOC, and 30o to 35oc; 25~ S at 20 ~ to 25oc and 30 ~ to 35oc). The larvae survived to the megalo