LOGIN

RSS Facebook Twitter YouTube
GLOSSARY       

SEARCHGLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

PROFILESEARCH

Sexual Dimorphism In Longnose Gar Lepisosteus osseus

Home Forums Ichthyology Sexual Dimorphism In Longnose Gar Lepisosteus osseus

This topic contains 0 replies, has 1 voice, and was last updated by  Matt 7 years, 8 months ago.

Viewing 1 post (of 1 total)
  • Author
    Posts
  • #301907

    Matt
    Keymaster

    Abstract

    The present study of Lepisosteus osseus dimorphism expands upon previous work by examining a broader array of morphometric characters while removing the bias associated with overall body length. A stepwise discriminant function analyses (swDFA) found that five characters best distinguish the sexes: head width, mid-snout width, anal-fin height, anal-fin width and prepectoral-fin length. Discriminant function analyses (DFA) with the five characters yields misclassification rates of 23·5% for females and 9·7% for males. Subsequent DFA using these five characters plus standard length yields misclassification rates of only 8·8% for females and 6·2% for males. The data presented here reveal differences in head and anal-fin shape between male and female L. osseus that may have evolved to enhance predatory abilities or competitive abilities during reproduction. This study is the first to find that L. osseus exhibits sexual dimorphism in characters without the biases of overall size.

Viewing 1 post (of 1 total)

You must be logged in to reply to this topic.