The reproductive cycle,condition index and biochemical composition of the horse-bearded mussel <Emphasis Type="Italic">Modiolus barbatus</Emphasis> |
| |
Authors: | Ivona Mladineo Melita Peharda Stjepan Orhanovi? Jak?a Bolotin Maja Pavela-Vran?i? Barbara Treursi? |
| |
Institution: | (1) Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia;(2) PMF Faculty of Natural Sciences, Mathematics and Education, N. Tesle 12, 21000 Split, Croatia;(3) Institute for Marine and Coastal Research, Kneza Damjana Jude 12, 20000 Dubrovnik, Croatia |
| |
Abstract: | The horse-bearded mussel Modiolus barbatus (Linneus, 1758) is an important edible bivalve in the Adriatic Sea; its population is especially large in the Mali Ston Bay
area, where the species is present at depths up to 8 m. In order to assess the sustainable exploitation rate for this species,
as well as to estimate its potential capacity for a sustainable aquaculture production, we determined the species’ reproductive
cycle along with its nutrient storage strategy, employing histological and biochemical methods. The population shows significantly
more females than males, and no hermaphrodites. The smallest adult individual, an active male, was 16.0 mm in length, suggesting
that sexual maturation starts around this length. While the period between January and February is characterized by sexual
repose, early and late stages of gametogenesis were found between March and May, and spawning peaked from June till August.
The increase of oocyte diameter followed the same trend. A significant positive correlation was observed between gonad index
and temperature, and a negative correlation between gonad index and salinity. Oscillations of stored nutrients were tightly
coupled with the gametogenic cycle. |
| |
Keywords: | Reproductive cycle Horse-bearded mussel Modiolus barbatus Adriatic Sea |
本文献已被 SpringerLink 等数据库收录! |
|