Eggs of a Internal-bearing.... eggs with oil/urea globules and/or high water con

Question

Eggs of a Internal-bearing.... eggs with oil/urea globules and/or high water content b. Brood-hiding ggs with oil globules, low-density guanine crystals, and/or high water content e. Extermal-bearing... inflation of embryonic gas bladder and/or eggs/embryos with high water content d. Pelagie-spawning... eggs with oil globules and'or high water content fishes are typically buoyant: this is achieved by 13. e All of the above 14. Extremely protracted spawning periods, during which spawning may be a daily activity for many months of the year, are commonly exhibited by many a Arctie benthic fishes b. Antarctic shelf fishes . Temperate lake fishes d. Tropical reef fishes a usually mate with males of a closely related bisexual species, but produce all female offspring h have arisen repeatedly, so that all these "species" represent several different clones, each with a 15. Unisexual fish species that reproduce by gynogenesis (or hydridogenesis) different origin and different ecological requirements are successful in some environs, probably due to a combination of factors such as increased reproductive potential and their adaptations to localized environmental conditions d. all of the above e. none of the above 16 are able to capture food organisms, although many still have a yolk sac; this developmental stage often looks quite different from the adult stage. a embryos b. larva c. juveniles d. all of the above In polyandry, one female mates w/ multiple males. This mating system is common in s fishes that in b. some male-brooding species and deepsea anglerfishes c many guarding/nesting fishes d. most of marine teleosts e. all of the above 17. spawn in massive mating aggregations (e.g., many herrings) 8. Alternative male strategies exhibited by Bluegill (Lepomis macrochtrus [Centrarchidae]; depicted in sketches) include a. dominant, nest-building male c. sneaker male d. all of the above b. satellite male (female mimie) 19. General spawning area(s) of the American eel (Anguilla rostrata) and European eel (A. anguilla);: a Caribbean Sea/Marianna Trench (American eel) and Norwegian Sea (European eel) b. Gulf of Mexico/Flower Garden Banks (American eel) and Mediterranean Sea (European eel) North Sea (American eel and European eel both spawn in this sea) d. Sargasso Sca (American eel and European eel -both spawn in this sea) e. none of the above

Explanation / Answer

Ans13. Eggs of Pelagic-spawning fishes are typically buoyant: this is acheived by eggs with oil globule and/or high water content.

Answer is d. as pelagic fishes lay eggs that float on/in the water due to high water content or cod oil.

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