Reproductive Biology of Neocaridina denticulata denticulata and Latreutes planirostris

What was studied

Study shape: Only ovigerous field females were selected for brood analysis. Carapace length was measured to 0.01 mm, every attached egg was counted and classified as non-eyed or eyed, five eggs per female were sampled for long- and short-axis volume estimates, and females plus eggs were dried for 48 hours at 80 C for reproductive-output calculations. Separate monthly groups of 48 to 60 females supplied gonadosomatic-index measurements.

Experimental unit: The individual selected ovigerous female for brood, egg-volume and reproductive-output results; the monthly female sample for the cross-sectional gonadosomatic series. Table 1 reports 43 Neocaridina females, while Table 2 reports 35 non-eyed-stage and 48 eyed-stage females.

Endpoints: carapace length, attached egg count, egg volume, female and egg dry weight, reproductive output, monthly gonadosomatic index, ovarian dry weight by embryo stage.

Claim boundary

What it can support: Among 43 selected ovigerous females measuring 5.69 to 7.85 mm carapace length, broods ranged from 47 to 117 eggs with a reported mean of 82 +/- 18. Mean sampled egg volume was 0.70 mm3, and reported reproductive output averaged 41.84 percent. Monthly gonadosomatic index was 3.8 to 4.3 from January through March, peaked at 27.5 in May, remained above 10 through July and declined from August. At a common carapace-length slope, ovarian dry weight was higher in females carrying eyed rather than non-eyed eggs, supporting ovarian rematuration during embryo development in this field sample.

What it cannot support: The published taxon is N. denticulata denticulata from one wild Korean population, not captive N. davidi or a selected aquarium line. The article does not report a taxonomic key or voucher, exact collection dates, effort, water temperature, chemistry, food, female source denominator or annual replication. Selection of ovigerous females prevents estimating prevalence, mating success or population fecundity. Preservation and destructive cross-sectional sampling mean individual females were not followed through hatch or a second brood; ovarian rematuration supports only the potential for consecutive spawning. Egg fertilization, retention, hatch, juvenile survival and brood loss were not measured. The monthly field pattern is not a temperature treatment, aquarium breeding calendar, clutch forecast or care target.

Publication status audit

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Correction impact

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Editorial review required (4)

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