Pomoxis nigromaculatus
black crappie
Type Locality
Wabash River, Ohio (LeSueur
1829 in: Cuvier and Valenciennes 1829).
Etymology/Derivation of Scientific Name
Pomoxis – sharp
opercle; as opposed to an extended in a flap as in some other sunfishes;
nigromaculatus – black spotted (Pflieger 1975).
Synonymy:
Cantharus nigro-mactulatus
LeSueur 1829 in: Cuvier and Valenciennes 1829:65
Pomoxys nigromaculatus
Hay 1881:500.
Pomoxis nigromaculatus
Cook 1959:175.
Pomoxys sparoides Hay
1883:62
Pomoxis sparoides
Hildebrand and Towers 1928:127
Pomoxis barberi
Hildebrand and Towers 1928:128.
Characters
Maximum size: Up to
559 mm TL (Carlander 1977).
Life colors: Body
pigmentation in scattered spots (Hubbs et al. 1991). Eyes yellowish brown;
dark spot at margin of opercle. Upper head and back green with blueish,
greenish, and silvery overtones; sides lighter green with randomly scattered
dark splotches; ventral head and abdomen whitish. Dorsal, anal, and caudal
fins with yellowish to greenish spots and vermiculations. Breeding male
usually darker and more intensely colored than female (Sublette et al.1990).
Buchanan and Bryant (1973) note a black predorsal stripe, extending around
the snout onto the chin, present in about 30% of specimens in some areas.
Counts: 7or 8 dorsal
fin spines; 5-8 anal spines; 6 or 7 branchiostegals (Hubbs et al. 1991);
31-44 lateral line scales; about 29 long, slender gill rakers (Sublette et
al. 1990); 14-16 dorsal rays; 17-19 anal rays; 14-15 pectoral rays (Ross
2001).
Body shape: Strongly
compressed; greatest body depth about the origin of dorsal fin; back rounded
(Sublette et al. 1991).
Mouth position:
Terminal, oblique (Goldstein and Simon 1999).
External morphology:
Length of dorsal fin base equal to or greater than distance from its origin
to posterior margin of eye; lateral line present (complete and arched upward
anteriorly; Ross 2001); scales ctenoid (Hubbs et al 1991); pectoral fins
elongate, broad, rounded; pelvic fins thoracic, tips rounded; anal fin
truncate to rounded; caudal fin slightly forked, lobes rounded (Sublette et
al. 1990).
Internal morphology:
Intestine well differentiated; peritoneum silvery; pyloric caecae present
(Goldstein and Simon 1999); small, sharp teeth on jaws and palantines
(Sublette et al. 1991).
Distribution (Native and Introduced)
U.S. distribution:
Native range originally included eastern Great Plains, north through the
Great Lakes region and east to the southern Atlantic coastal drainages of
Virginia (Hubbs et al. 1991).
Texas distribution:
Native range originally included the central part of the state eastward,
exclusive of the Edwards Plateau (Hubbs et al. 1991). Warren et al. (2000)
list the following drainage units for distribution of Pomoxis
nigromaculatus in the state: Red River (from the mouth upstream to and
including the Kiamichi River), Sabine Lake (including minor coastal
drainages west to Galveston Bay), Brazos River, Colorado River, San Antonio
Bay (including minor coastal drainages west of mouth of Colorado River to
mouth of Nueces River), Nueces River.
Abundance/Conservation status (Federal, State, NGO)
Populations in southern
drainages are currently stable (Warren et al. 2000).
Habitat Associations
Macrohabitat: Inhabits
large ponds and shallow areas of lakes (Lee 1980). Commonly found in slower
sections of large streams, oxbow lakes, and reservoirs (Ross 2001).
Mesohabitat: Occurs in
quiet warm waters; usually associated with abundant aquatic vegetation and
sandy to muddy bottoms (Lee 1980). Occupy middle to upper sections of water
column (Ross 2001). In reservoirs, they may be associated with inundated
terrestrial vegetation, and as the material deteriorates over time, the
black crappie may decline in abundance relative to the white crappie (Ball
and Kilambi 1972). In Lake Texoma (Oklahoma-Texas), where the species was
stocked shortly after impoundment, white crappie were reported by Riggs and
Bonn (1959) to be very rare; only two specimens taken during 1954-1959, from
a site along with several thousand white crappie. Fish move mostly at night
or in the early morning, and in reservoirs (if not other habitats as well)
tend to move from open waters during the day to shore at night (Guy et al.
1992; Keast and Fox 1992). Movement also increases during periods of rising
barometric pressure (Guy et al. 1992).
Biology
Spawning season: In
Texas, late March – early May (Schloemer 1947); in Florida, early spring
(Reid 1949; Huish 1958).
Spawning habitat: In
shallow water (Reid 1949; Huish 1958); fish prefer nesting areas near cover
of some kind, especially emergent or floating vegetation (Reid 1949).
Reproductive Behavior:
Guarders; nest spawners; phytophils, plant material nesters that have
adhesive eggs and free embryos that hang on plants by cement glands. Species
adapted to nesting on or above soft muddy bottoms (Simon 1999). Spawning
behavior approximates that of the white crappie (Pomoxis annularis)
except that nests are more associated with vegetation where possible and it
may have a preference for cleaner substrates (Carlander 1977; Etnier and
Starnes 1993). Males guard the nest, usually feeding on a close-by food
source such as amphipods associated with vegetation during this time (Reid
1949).
Fecundity: Eggs
demersal and adhesive; incubate in 48-68 hours at 18.3 degrees C;
water-hardened, ripe eggs are small compared to other members of the family,
averaging only 0.93 mm in diameter (Merriner 1971). Fish in the 3-8 year age
group produce 3,000-188,000 eggs (Vessel and Eddy 1941).
Age at maturation:
Migration: Fish move
into shallow water in early spring for spawning (Reid 1949; Huish 1958).
Growth and Population
structure: In Alabama, fish averaged 136 mm TL after one year, 202 mm
after two, 257 mm after three, and 299 mm TL after four years (Reed and
Davies 1991).
Longevity: Up to 10
years (Huish 1958).
Food habits:
Invertivore/carnivore (Goldstein and Simon 1999). Primarily nocturnal
foragers, though may feed occasionally during the day (Huish 1958; Keast
1968a; Helfman 1981; Keast and Fox 1992). Pomoxis nigromaculatus are
less efficient than white crappie (P. annularis) at taking fishes in
turbid water, resulting in increased mortality of individuals larger than
200 mm TL. Feeding activity may shift to late afternoon as a result of high
turbidity (Ellison 1984). Very small fish eat mainly microcrustaceans
(copepods and cladocerans) and midges (chironomids); fish about 60 - 115 mm
TL consume mainly small crustaceans and small insect larvae and pupae,
rarely fishes; fish 116 - 160 mm TL include fish regularly in the diet. Due
to the fact that fish larger than 160 mm TL cannot ingest enough zooplankton
to maintain a positive growth rate, they primarily consume minnows and
sunfishes (Reid 1949; Ellison 1984). Keast and Webb (1966), Keast and Welch
(1968), and Keast (1968a, 1968b) reported food volume up to 70% Chaoborus
larvae, 50% cladocerans, 20% copepods, 25% fishes, 15% flying insects, 25%
chironomid pupae and larvae, etc.; food habits of this species likely
similar throughout range.
Phylogeny and morphologically similar fishes
The black crappie is most
similar to the white crappie (Pomoxis annularis), but differs in
having 7-8 rather than 5-6 dorsal spines, a longer dorsal fin base (the
length of fin base is greater than or equal to the distance from dorsal
origin to eye), and a somewhat deeper body. The black crappie differs from
other centrarchids in having 7-8 dorsal spines versus 10 or more (Ross
2001). Black crappie generally prefer cleaner, deeper and cooler waters than
do white crappie (Carlander 1977). Black crappie known to hybridize in
nature only with the white crappie (Pomoxis annularis); artificially
crossed with other genera (Schwartz 1972; Travnichek et al. 1996).
Host Records
Gyrodactylus
goerani host, Gyrodactylus lineadactylus host (Harris et
al. 2004). Listed for species throughout entire range: protozoans (14),
trematodes (19), cestodes (5), nematodes (9), acanthocephalans (4), leeches
(1; Hoffman 1967).
Commercial or Environmental Importance
In Texas, the black crappie
has been widely introduced as a game species, although not to the extent of
the white crappie (Pomoxis annularis; Hubbs et al. 1991). This
species spawns about the same time as largemouth (Micropterus salmoides)
or spotted (Micropterus punctulatus) basses, and is therefore less
affected by bass predation; this may result in overpopulation and stunting
(DeVries and Stein 1990; Reed and Davies 1991).
References
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