Gross and Nowell, 1980



Citation


Gross, M.R. and Nowell, W.A. (1980) The Reproductive Biology of Rock Bass, Ambloplites rupestris (Centrarchidae), in Lake Opinicon, Ontario. Copeia,, pp. 482-494

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Ambloplites rupestris Spawning conditions Mating system By pair, apparent promiscuity [A female may spawn in different nests (3 males maximum). Males may also spawn with more than one female and four males were observed serially spawning with alternating female] Ambiguous
Ambloplites rupestris Spawning conditions Nycthemeral period of oviposition Spawning occured more often in early morning (0700-1100: n=10) than either mid-day (1100-1330: n=3) or late evening (2010-2045: n=2) suggesting a temporal preference Day
Ambloplites rupestris Spawning conditions Parental care Male provides care for the eggs and larvae interm of egg fanning and predator defence: on average 14 days No category
Lepomis gibbosus Spawning conditions Parental care Male defends the nest for 6-7 days Male parental care
Ambloplites rupestris Spawning conditions Spawning substrate Coarse sand to gravel, nest susbtrate averaging 1.7 cm [No nests were found in muddy, organic substrates] Ambiguous
Ambloplites rupestris Spawning conditions Spawning site preparation Male constructs a nest [Male extablish territories which each male constructs its nest. Nesting territories are aggressively defended from other fish] Nest built by male
Ambloplites rupestris Spawning conditions Spawning temperature Breeding starts when water temperature reach 20-23 21.5 °C
Ambloplites rupestris Spawning conditions Spawning period duration 4-5 [The nesting period lasted 42 days (20 May-30 June) but most reproductive activity occured within a 19 day period (21 May-8 June)] 4.5 weeks
Ambloplites rupestris Spawning conditions Spawning water type Lake, near the shorline Stagnant water
Ambloplites rupestris Spawning conditions Spawning depth Shallow waters: mean water depth of nests was 77.4 cm. While nests ranged from 45 to 138 cm depth, the majority of males (64%) nested between 50 and 69 cm 77.4 m
Ambloplites rupestris Male Male sexual dimorphism During spawning the male's body darkens, resulting in a pitch-black male contrasting sharply beside the unchanged female Absent
Ambloplites rupestris Egg Egg adhesiveness The eggs adhere to the nest substrate Adhesive
Ambloplites rupestris Egg Incubation time 5 days in natural conditions 5.0 days
Ambloplites rupestris Egg Temperature for incubation 16-22 [Natural conditions] 19.0 °C
Ambloplites rupestris Spawning conditions Spawning migration distance Move inshore within the same lake No data
Ambloplites rupestris Egg Egg Buoyancy Demersal [sink in to the nest] Ambiguous
Ambloplites rupestris Spawning conditions Spawning season May-June ['May', 'June']
Ambloplites rupestris Larvae Larvae behaviour Nine days before leaving the nest Demersal
Ambloplites rupestris Spawning conditions Spawning release Multiple spawner Mutliple