Savari, A., Haghi, M., Dehghan mediseh, S. (2008). POPULATION STRUCTURE OF FEROSAGITTA FEROX (CHAETOGNATHA) IN THE NORTHWEST COASTAL WATERS OF THE PERSIAN GULF. , 17(1), 55-62. doi: 10.22092/isfj.2008.115229
A. Savari; M. Haghi; s. Dehghan mediseh. "POPULATION STRUCTURE OF FEROSAGITTA FEROX (CHAETOGNATHA) IN THE NORTHWEST COASTAL WATERS OF THE PERSIAN GULF". , 17, 1, 2008, 55-62. doi: 10.22092/isfj.2008.115229
Savari, A., Haghi, M., Dehghan mediseh, S. (2008). 'POPULATION STRUCTURE OF FEROSAGITTA FEROX (CHAETOGNATHA) IN THE NORTHWEST COASTAL WATERS OF THE PERSIAN GULF', , 17(1), pp. 55-62. doi: 10.22092/isfj.2008.115229
Savari, A., Haghi, M., Dehghan mediseh, S. POPULATION STRUCTURE OF FEROSAGITTA FEROX (CHAETOGNATHA) IN THE NORTHWEST COASTAL WATERS OF THE PERSIAN GULF. , 2008; 17(1): 55-62. doi: 10.22092/isfj.2008.115229

POPULATION STRUCTURE OF FEROSAGITTA FEROX (CHAETOGNATHA) IN THE NORTHWEST COASTAL WATERS OF THE PERSIAN GULF

مجله علمی شیلات ایران
Article 6, Volume 17, Issue 1, January 2008, Pages 55-62    PDF (290.78 K)
Document Type: Research Paper
DOI: 10.22092/isfj.2008.115229
Authors
A. Savari; M. Haghi; s. Dehghan mediseh
Abstract
Population dynamics of Ferosagittaferox (Chaetognatha) was carried out in coastal waters Of Khur-e-Mussa's Channel in Khuzestan Province, northwest Persian Gulf. Monthly samples were collected with 300 mm mesh size plankton net in oblique tow from near bottom to surface waters. In total, 7 species of Chaetognaths were identified belonging to I class (Sagittoidea), 1 order (Aphragmophora), 2 families (Sagittidae and Krohnittidae) and 4 genera (Aidanosagitta, Ferosagitta, Flaccisagitta and Krohnitta). The identified species included Aidanosagitta bedfordi, A. neglecta, Ferosagitta ferox, Flaccisagitta enflata, F. hexaptera, Krohnitta pacifica and one unknown species. Due to presence and excessive frequency of Ferosagitta ferox in all samples, we focused on its population variation as an indicator of Chaetognatha. We determined length groups for adult individuals in 4-21mm range with 1mm increments. The year round presence of juvenile and small individuals showed the continuous reproduction of F. ferox with two considerable peaks in March and July. The evaluated recruitment indicated that the species has a low growth rate and a long life cycle.
Keywords
CHAETOGNATHA; FEROSAGITTA FEROX; population; KHOUZESTAN PROVINCE; Persian Gulf; Iran
References
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