We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Length-weight relationship and morphometrics of the sailfish, Istiophorus platypterus (Shaw & Nodder) from Parangipettai, Southeast coast of India
- Authors
Velayudham, Ravi; Veeramuthu, Sekar; Kesavan, Kaila
- Abstract
Abstract: Objective: To obtain the morphometric characters and to determine the length-weight relationship for the sailfish captured off from Parangipettai, Tamil Nadu, Southeast coast of India. Methods: Samples of the sailfish were collected from the landing centre of this region during July 2010 to June 2011 using longline, gillnet and handline through commercial vessels. Salient morphometric and meristic characters were also measured (cm). Results: The total length recorded in the present study was ranged between 92 and 385 cm (mean 244.30±15.08). The I dorsal fin base was varied from 18 to 145 cm (mean 98.40±3.21); I dorsal ray fin height from1.4 to 21 cm (mean 10.30±0.30); last ray fin length from 0.9 to 16 cm (mean 8.30±0.05) and the highest ray length from 28.2 to 126 cm (mean 85.60±2.15). The linear regression analysis was also executed to study the length-weight relationship; the ‘r’ value for the sailfish from this region was found to be 0.986 6 and the regression equation Log W = −5.4431 L 3.007. Conclusions: In the present study, the slope value (b) was in the expected ‘3’ that indicates a fish becomes more slender as it increases in length. Further the slope value which is greater than 3 denoting stoutness or allometric growth. However, deviation from isometric growth is often observed, as most fish change their body shape as they grow.
- Subjects
INDIA; MORPHOMETRICS; SAILFISH; BODY composition of fish; REGRESSION analysis; FISH physiology
- Publication
Asian Pacific Journal of Tropical Biomedicine, 2012, Vol 2, Issue s1, pS373
- ISSN
2221-1691
- Publication type
Article
- DOI
10.1016/S2221-1691(12)60190-7