BEHAVIOR AND ECOLOGY OF SPELEONECTES EPILIMNIUS (REMIPEDIA, SPELEONECTIDAE) FROM SURFACE WATER OF AN ANCHIALINE CAVE ON SAN SALVADOR ISLAND, BAHAMAS

in Crustaceana
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Abstract

Speleonectes epilimnius (described earlier in this issue), was observed at the surface of cave pools and in the laboratory. This unique cave habitat for remipedes is described. Videotapes of six live specimens shot under a microscope provided the only detailed observations to date for feeding, grooming, and resting behaviors for remipedes. During feeding, maxillae 1 and 2 held food tightly while repeatedly piercing, scratching, and rotating it; they periodically moved food to the mandibles, which rapidly chewed off tissue in typical crustacean fashion. Peristalsis moved food throughout the midgut and to diverticula of trunk segments, but not to the anal segment. Several structures were used in grooming. Antenna 1 was groomed by power strokes of anterior swimming appendages. Antenna 2 and frontal filaments groomed each other. Maxillae 1-2 and maxillipeds groomed the mouth area, posterior third of the body, and each other. Speleonectes epilimnius (decrit precedemment dans ce fascicule), a ete observe dans une grotte a la surface des bassins d'eau souterraines et au laboratoire. Cet habitat de grotte, unique pour les remipedes est decrit. Les enregistrements videos, realises au microscope sur six specimens vivants ont fourni les seules observations detailees a ce jour sur les comportements d'alimentation, de toilettage et de repos chez les remipedes. Au cours de la prise de nourriture, les maxilles 1 et 2 maintiennent la nourriture fermement pendant qu'elle est percee, grattee, retournee; elles portent periodiquement la nourriture aux mandibules qui rapidement mastiquent les tissus d'une facon typique chez les crustaces. Des mouvements peristaltiques font avancer la nourriture a travers l'intestin moyen et vers les diverticules des segments du tronc, mais pas jusqu'au segment anal. Plusieurs structures sont utilisees pour le toilettage. L'antennule est nettoyee grace a de puissants coups des appendices natatoires anterieurs. L'antenne et les filaments frontaux se nettoient les uns les autres. Les premieres et deuxiemes maxilles et les maxillipedes nettoient la region buccale, le tiers posterieur du corps et egalement se nettoient reciproquement.

BEHAVIOR AND ECOLOGY OF SPELEONECTES EPILIMNIUS (REMIPEDIA, SPELEONECTIDAE) FROM SURFACE WATER OF AN ANCHIALINE CAVE ON SAN SALVADOR ISLAND, BAHAMAS

in Crustaceana

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