. The Australian zoologist. Zoology; Zoology; Zoology. MITCHELLIAN FRESHWATER HARDYHEAD is transparent and flattened dorso-ventrally. The fork in the caudal fin appeared to be slightly wider than in males. Mature females were found at mm (total length) and (caudal fork length) when they weighed g (Table 2). Although the rate of growth (Figure 6) has not been measured for fish smaller than mm total length, growth estimates suggest that the males and females could mature at 1 year old in favourable N D 1969 MONTHS FIG. 6. Graph showing relationship between th
. The Australian zoologist. Zoology; Zoology; Zoology. MITCHELLIAN FRESHWATER HARDYHEAD is transparent and flattened dorso-ventrally. The fork in the caudal fin appeared to be slightly wider than in males. Mature females were found at mm (total length) and (caudal fork length) when they weighed g (Table 2). Although the rate of growth (Figure 6) has not been measured for fish smaller than mm total length, growth estimates suggest that the males and females could mature at 1 year old in favourable N D 1969 MONTHS FIG. 6. Graph showing relationship between the length of fish and age for two groups of six kept in an aquarium (C). The estimated growth of one of the groups prior to capture is also shown (B). a, total length of largest fish initially collected from pond; b, average total length of group of fish initially collected from pond; c, average caudal fork length of group of fish initially collected from pond; d, total length of smallest fish initiallv collected from pond; e. average total length of group of six fish collected from Roach's Regulator; f, average caudal fork length of group of six fish collected from Roach's Regulator; g, all fish of this group died; h, length of larvae at hatching (approximately mm); x, date at which fish were placed in aquaria. Fecundity Ovaries and testes were not sampled on a regular basis due to lack of sufficient material, but the material available is summarised below. The ovaries of Craterocephalus spp. are covered in a black mesovarium, are single and their length attains approximately 16% of the total length of the fish. The lining of the abdominal cavity is also black. Since there appears to be a progressive development of ova in the ovary during the spawning period which Aust. Zool. 20(2), 1979 283. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not pe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
